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Topic # 113468 18-Jan-2013 00:15 Send private message

My nana has just come out of hospital and they want her to get a medical alarm, she has broadband so i need to put in a splitter. 

the master phone jack is in the hall and i plan to just make that the adsl jack point for now, ill put the wireless modem there and connect her computer to that, all will be fine, i have some questions though, i'm no wiring expert, all i need to know is how to connect the wires to each other?

http://pbtech.co.nz/index.php?z=p&p=MODDNX001&name=DYNAMIX-XDSL-Master-Wired-in-filter-ADSLADSL2+VDSL

this is the one i found on google.













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  Reply # 746601 18-Jan-2013 00:40 Send private message

The LINE pair on the splitter connects to the cable that comes in off the street. This cable is usually a thicker black cable with noticeably thicker copper conductors than the rest of the house wiring.
There are usually 4 wires in this cable. Before taking any wires off, take note of which pair of wires is being used in the cable that comes off the street. These are the wires you need to connect the LINE of the splitter to.

After that, connect the DSL pair up to the cable that will go to the single DSL/Broadband jackpoint.
Note: This jack point will become the ONLY jackpoint that you can hook your DSL/Broadband into. It also needs to be completely separated from the other jackpoints in the house if they have already been wired up to one another.

The PHONE pair connects to the remaining jackpoints that will be used with normal phones in the house.

There may be some info that I have forgotten, or is completely wrong. Although, I think it's right.
If not, both cyril7 and coffeebaron are the wizards when it comes to phone wiring. I'm sure they would be more than happy to chime in here with any other info that might be needed.

Also, depending on where you are located in the country, either one of those two guys might be able to install it for you, if that's what you wanted.



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  Reply # 746602 18-Jan-2013 00:51 Send private message

thanks, i meant how do the wires actually connect together, is that what those little bobble things are for?













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  Reply # 746604 18-Jan-2013 01:01 Send private message

What, you made me write all that?!? Nah, just joking. ;)

Yes, those connectors are called ScotchLoks.
They are gel filled which automatically insulates the wires from corrosion etc.
All you need to do is put the wires you want to connect into one of them and push down hard on the orange button... sometimes with a pair of pliers to make sure it's done right.

These:



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  Reply # 746605 18-Jan-2013 01:13 Send private message

dontpanic42: What, you made me write all that?!? Nah, just joking. ;)

Yes, those connectors are called ScotchLoks.
They are gel filled which automatically insulates the wires from corrosion etc.
All you need to do is put the wires you want to connect into one of them and push down hard on the orange button... sometimes with a pair of pliers to make sure it's done right.

These:


oh thanks! no, no the other post will serve as a helpful reference :P















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  Reply # 746607 18-Jan-2013 01:20 Send private message

also, how should i get the ones already on the wires off, just cut the wires?













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  Reply # 746608 18-Jan-2013 01:24 Send private message

Yip, just cut them off and chuck them away. They're a one-time-use item.
Note: Cut each wire separately so as to avoid short circuiting anything with your pliers/side-cutters.

You should be able to pick a handful up from your local electrical wholesaler. If they won't sell you any, or you can't find any, I'm sure either cyril7 or coffeebaron will be able to help you out.

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  Reply # 746623 18-Jan-2013 07:04 Send private message

im sure i have seen the connectors at DSE.

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  Reply # 746626 18-Jan-2013 07:20 Send private message

kornflake: im sure i have seen the connectors at DSE.


Or Jaycar. Link is the 3 way but they have both.

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  Reply # 746636 18-Jan-2013 07:59 Send private message

Just a note on using Scotchloks, firstly you dont need to stip the insulation when using them, these are called IDC (Insulation Displacement Connectors) that basically force the wire into a fork inside the loc, this slices the insulation and creates a gas tight connection between the fork and the copper wire.

2ndly, before presenting the wire to the loc I recommend you straighten any minor twist of the wire for a length of around 15-20mm, this ensures the wire lies correctly in the loc.

3rdly, when inserting the wires hold the loc so that the coloured side is away from you, this will let you see the wires in the loc so you can ensure each wire is fully home to the top of the loc.

4thly to close the loc, there is a proper tool however you can just use your fingers to start to close the loc, then finish it off with a pair of flat nose pliers, because pliers present an angled closure (which the real tool does not) then you may need to sqeeze the lock 2 or 3 times from different angles to ensure its closed flat. Dont need to apply much pressure, just firm.

Also a note on twisted pair wiring for DSL. Unlike voice services which see the phone line like a lumped wire, DSL signals are infact radio signals that use the cable as a true twisted pair 100ohm transmission line, therefore the impedance is actually very important. Obviously you have to untwist some of the wire to make the temination, but try keep it to a minimum.

Impedance of a twisted pair transmission line is a function of the diameter of the copper, the distance apart of the two conductors and the dielectric characteristic of the insulation. If the two wires of the pair come apart or splay then the impedance goes up and will cause reflections for the signal. The twist of the pair serves two purposes, one to help improve crosstalk performance but most importantly to keep the two conductors hard together to therefore maintain 100ohm impedance.

As a result its ideal to ensure all twisted pairs carrying the DSL signal (ie the pair from the street and then via the orange port to the filter and the pair going all the way to the modem from the green port of the filter) have the twist maintained as much as possible, so only untwist as much as needed no more and if the pairs do untwist, retwist them a bit.

The drop line from the street is sub cat3 telco cabling that is very loosely twisted, this is because historically the transmission line impedance for voice services was not really an issue, however the way this loose twist cable is made it does keep its characteristic, but once it leaves the sheath easily splays. historically Telco techs dont give a damn about this, as voice does not really matter, but if you ever put a TDR on a phone line you can easily see the difference where the installation has maintained good impedance and where its just a rats nest.

This above advise applies to all twisted pair wiring that carries RF signals, ie DSL, Ethernet etc.

Cyril



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  Reply # 747072 18-Jan-2013 18:34 Send private message

okay so this is whats in the master jackpoint, the black cable is i think the line from the street, the grey and white ones are for the phones in the rest of the house i presume.

what i don't understand is what that blue wire is for, the splitter only has 2 wires.

















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  Reply # 747102 18-Jan-2013 20:01 Send private message

Pull the blue wire off and tuck it away.

It is the old ringing circuit for old phones and isn't required any more.

Edit:
So it will be black cable to orange pair of splitter, then grey and white cable to blue pair and then you have your green pair free to send the DSL to wherever you would like.

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  Reply # 747106 18-Jan-2013 20:13 Send private message

chevrolux: Pull the blue wire off and tuck it away.

It is the old ringing circuit for old phones and isn't required any more.

Edit:
So it will be black cable to orange pair of splitter, then grey and white cable to blue pair and then you have your green pair free to send the DSL to wherever you would like.


Yep the old bell wire will just act as a beverage antenna and stuff your DSL with the local AM Tx.

Cyril



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  Reply # 747217 19-Jan-2013 01:11 Send private message

cyril7:
chevrolux: Pull the blue wire off and tuck it away.

It is the old ringing circuit for old phones and isn't required any more.

Edit:
So it will be black cable to orange pair of splitter, then grey and white cable to blue pair and then you have your green pair free to send the DSL to wherever you would like.


Yep the old bell wire will just act as a beverage antenna and stuff your DSL with the local AM Tx.

Cyril


ah okay, my nana has a bell outside that you can turn on when the phone rings, she never uses it though so if it affected this it wouldnt bother anyone













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  Reply # 747218 19-Jan-2013 01:15 Send private message

See what I mean about cyril7 being a wizard with all things telecommunications. ;)



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  Reply # 747219 19-Jan-2013 01:16 Send private message

well thanks guys :) i plan to make this plug the dsl one, just for now since we can't get under the hosue due to liquefaction to run a cable.













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